Microscope eye piece tube



Dec. 22, 1931. w. PATTERSON 1,837,993

MICROSCOPE EYE PIECE TUBE Filed March 17, 1930 INVENTOR ATTORNEY meansthat for a vast majority of micro- Patented Dec. 22, 1931 UNITED STATES-m'rlarrr OFFICE WILLIAM L. PATTERSON, OF ROCHESTER, NEW YORK, ASSIGNOBTO IBAUSCE & LOKB OPTICAL OOMPANY, 01' 300mm. NEW YORK, A. CORPORATION01 NEW YORK mcaoscorn mm mm rum:

Application filed larch 17, 1980. Serial 80. 488,370.

In makmg a microscopic examination of certain specimens such as fluids,for example, it is often very desirable, if not absolutely essential,that the stage of the microscope,

which carries the specimen, be mainta' ed in uch a.

a substantially horizontal position. horizontal position of the stage,however,

scopes the body tube will be vertically positioned so that the line ofsight will also be vertical. In using such an instrument on a table, itis therefore necessary'for the microscopist to sit very erect in orderto enable him to look vertically down along the line of sight of theinstrument. Such a position is uncomfortable and very tiring, especiallyto those who use the instrument for long periods of time, such asresearch workers or laboratory technicians, for example.

One of the objects of my invention is to provide means whereby lightrays from a vertical tube of a microscope may be deflected at an angleto the vertical. Another object is to provide a simple and eflicientdevice for a microscope whereby light rays from the body tube may bereflected into an angularly disposed eye piece tube. Still anotherobject is to rovide a simple, detachable device where y a microscopehaving a vertically disposed eye piece tube-can readily be altered toprovide an inclined eye piece tube or vice versa. Other objects andadvantages reside in certain novel features of construction, arrangementand combination of parts as will hereinafter be more fully described andpointed out in the appended claims.

Referring to the drawings:

Fig. 1 shows a side elevation of a microscope embodying my invention.

Fig. 2 is anenlarged side view. showing my improved eye iece tubestructure.

Fig. 3 is a vertical sectional view of the same. I

A preferred embodiment of my invention is shown in the drawings wherein10 indicates a bushing having a threaded 11 with a cooperating ck nut12. ecured within bushing 12 by screws 13 is the block 14 which carriesthe an ularly disposed eye piece tube 15. The usua ocular or eye piece16, comprising lenses 17 and 17, is carried in the eye piecev tube 15.Mounted within'the block 14, by suitable means, not shown is thereflecting prism. 18 havi the two reflectin surfaces 19 and 20.

fIn use, the usualvertical eye piece tube is unscrewed from the bodytube of the microscope and my device is secured to the body tube B of amicroscope as shown in Fig. 1, by means of the threa ed portion 11 onbush ng 10. Although in Fig. 1 the eye p ece tube 15 is shown asrearwardl inclined, it may be positioned in any se ected position bymerely rotating the bushing 10 on its threaded portion 11 and thenlockin it. against rotation by means of the loci nut 12.

In operation, light rays pass upwardly through the body tube B and intothe prism 18 to the reflectinglsurface 19 where they are totallyreflected, t ence to the reflectin surface 20 and thence outwardl throngthe lenses 17 and 17 of the ocu ar 16. Thus, 1t will follow that due tothe two successive reflections at surfaces 19 and 20, the image observedthrough the inclined ocular 16 will be inverted and reverted exactly thesame as the ima e which is observed in the usual vertically lsposedocular. This is an important feature as it "eliminates the chance ofconfusion which mi ht result if the image observed through t e inclinedocular were not inverted and reverted in the same manner as is the imagewhich is observed through the usual type of ocular, all as is well knownto those skilled in the art. Another feature of my invention resides inthe fact that my device may be readily interchanged with the usualvertical eye piece tube.

From the foregoing it will be apparent that I am able to attain theob'ects of my invention and rovide a simple, eflicient device whereby te ocular of a microsco e may be inclined to the axis of the body tu e.Vari ous modifications can obviously be made ortion 2 i 1,ea7,eea

without departing from the spirit of my invention.

I claim: 1. A microsco havin in combination a 6 vertical bod tu e, a busing member carried by sai body tube, an angularly disposed eye piecetube mounted on said bushin 'member reflecting means for divertin lig trays rom said body tube into sai 10 eye piece tube, said means comrising a prism having a horizontal face an two inclined faces wherebylight rays from said body tube are reflected twice before entering saideye piece tube. l5 2. A microscope having in combination a vertical bodytube, a bushing member rotatably mounted on said body tube, means forselectively locking said bushing member against rotation, an angularlydisposed eye piece tube carried by said bushing member,

a reflecting prism mounted in said bushin member for diverting lightrays from sai body tube into said eye piece tube, said rism havmg tworeflecting surfaces for pro ucin two successive reflections of lightrays whic pass from said body tube into said eye piece tube.

3. A microscope having in combination a vertical body tube, a bushingmember threaded to said body tube, means for locking said member, anapertured block mounted within said bushing member, an angularlydisposed tube carried by said block, an eye iece carried by said tube, arism carrie b said block, said prism havmg a horizontal y disposed lightreceiving surface and two inclined reflecting surfaces whereby lightrays from said body tube are successively reflected and directed intosaid eye piece.

40 WILLIAM L. PATTERSON.

